Telegraph-printer system



Oct. 18, 1927.

. 1,645,591 J. P. FERRITER ET AL TELEGRAPH PRINTER SYSTEM Filed Nov.1925 Transiwii'iin '60 tidns. It will be seen from the name Oct-1s.1927.

' UNITED STATES :oim r. mamas, or reason,

uas sacnusnrrs, AND EARLY ORANGE, NEW JERSEY.

TELEGRAPH-PRINTER SYSTEM.

Application filed November 18, 1925. Serial No. 68,868.

The object of this system is to transmit telegraph signals at a highrate ofspeed, either by radio or over a wire, and to print the receivedsignals without the necessity for I synchronizing the transmitting andreceiving apparatus.

Existing telegraph printer s stems and apparatus are used forperforating tape and transmitting signals, using either the five unitcode or the continental code, depending on the type of printer systemutilized. The perforated tape is caused to actuate the transmitter,which sends the signals over the line in the usual manner. At thereceiv- 35 ing station, the received signals pass through the coils ofthe receiving relay andactuate it in the usual manner. At this point, wedepart from the usual system of causing the receiving relay to actuateone or more printers. Instead, we cause the relay armature contacts tointerru t a tone produced by a tone generator,l a huzzer or othersuitable device, as shown in Figure 1.

With the foregoing and other objects in I view, the invention consistsin the combination and arrangement of parts hereinafterdescribed,certain embodiments thereof being illustrated in theaccompanying drawings, in which the improved system.

Figure 2 is a detailed diagrammatical showing of the relation betweenthe recording and reproducing element and the re- 85. mainder of thesystem. v

Referring more articularly to the draw ings, in Figure 1, (l and C arethe armature contacts of the receiving relay .C and C are connectedelectrically in series 40 with tone generator telephone receiver T. Thediaphragm D of receiver T is encased directly above the recorder R on a'dictating phonograph-in such a manner that, when the receiver diaphragmD is caused to vibrate, it transmits the vibrations to the stylus S ofrecorder R. Stylus S rests on a moving wax cylinder W on which it makesa record of the vibrations of diaphragm D in the form of smallindentaforegoing description that, when contacts 0 and C are closed, analternating current from generator G will pass through the coils ofreceiver y 7 D which carries Figure 1 is a diagrammatical showing of R.Contacts with a battery G G and the coils of a H T, actuating itsdiaphragm and. causing a record to be placed on the wax cylinder Wand,-when contacts C and C are open, due to the action of relay R inresponding'to line ceiver coils and no record will be made on thecylinder. In this manner, signals transmitted from the distant station Xactuate the relay R at receiving station Y and cause a record to be madeon cylinder In order to translate the signals recorded on cylinder W,thecylinder is placed on a dictating phonograph equipped .with a specialreproducer which rectifies the signals and actuates a telegraph'nelay.This telegraph relay passes the signals to the printer distributor andcauses the' printer to print the characters originally transmitted fromStation X.

The special reproducer referred to is described fully in a separatepatent application. Its action is as follows, as shown in Figure 2, inwhich A is a small bar, pivoted at one end and carrying a contact nearthe otherend. B is a fiat spring, rigidly fas- E. STRADLEY, or WESTsignals, no current will pass through the re' I tened at one end,carryinq a contact near the other end facing the contact on bar B, andattached by a stilf wire C to the inertia bar the reproducing stylus E.F is the phonograph record.

The action'of when the reproducing stylus passes over the series ofindentations on the record forming a signal, the spring Due to theinertia of the bar A, thecontact on it does not follow exactly themovements of the contact mounted on the spring B. These two. contactsare connected in series and the coils of the relay to be operated. 'Whenthe reproducing stylus E passes over a signal on the record F,the-resulting vibration of spring B introduces sujficient resistancebetween the contacts'on A and B to practically stop-the flow ofcurrent'through the coils of relay H,

but when the stylus E passes over a blank space on the cylinder, thecontacts on A and B remain closed and current passes through the coilsof H and actuate its armature. The operatio of the local contacts ofrelay H may then be caused to actuate a printer in the usual'manner.

Some of the advantages of our system over this device is as followsz Bis caused to vibrate.

other telegraph printer systems are that signals may be transmitted at ahigh rate of speed Without regard to the mechanical limitations of thereceiving printers, as the printers are entirely disassociated from theline. 'Synchronism betweenthe sending and receiving stations is notnecessary, as the cylinders containing the received signals may beplaced on a dictating phonograph at any time and reproduced at any rateof speed suitable for the printer which they operate. The cylinders maybe run any desired number of times or may be caused to operate anydesired number of printers. This is useful when more than one copy ofthe messages are required.

JOHN P. FERRITER. EARLY E. STRADLEY.

